WO2005117900A1 - Use of a detergent for the non-surgical removal of fat - Google Patents

Use of a detergent for the non-surgical removal of fat Download PDF

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Publication number
WO2005117900A1
WO2005117900A1 PCT/US2005/004184 US2005004184W WO2005117900A1 WO 2005117900 A1 WO2005117900 A1 WO 2005117900A1 US 2005004184 W US2005004184 W US 2005004184W WO 2005117900 A1 WO2005117900 A1 WO 2005117900A1
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Prior art keywords
fat
detergent
pharmacologically active
phosphatidylcholine
medicament
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PCT/US2005/004184
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English (en)
French (fr)
Inventor
Michael S. Kolodney
Adam M. Rotunda
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Los Angeles Biomedical Research Institute At Harbor-Ucla Medical Center
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Priority to EP18185014.0A priority Critical patent/EP3424508B1/en
Priority to EP05722895A priority patent/EP1758590B1/en
Priority to MXPA06013437A priority patent/MXPA06013437A/es
Priority to DK05722895.9T priority patent/DK1758590T3/da
Priority to PL05722895T priority patent/PL1758590T3/pl
Application filed by Los Angeles Biomedical Research Institute At Harbor-Ucla Medical Center filed Critical Los Angeles Biomedical Research Institute At Harbor-Ucla Medical Center
Priority to AT05722895T priority patent/ATE521355T1/de
Priority to AU2005245002A priority patent/AU2005245002B8/en
Publication of WO2005117900A1 publication Critical patent/WO2005117900A1/en
Priority to HK07108856.9A priority patent/HK1101062A1/xx
Priority to LTPA2017006C priority patent/LTPA2017006I1/lt
Priority to CY2018008C priority patent/CY2018008I2/el

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/10—Dispersions; Emulsions
    • A61K9/127—Liposomes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/56—Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids
    • A61K31/575—Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids substituted in position 17 beta by a chain of three or more carbon atoms, e.g. cholane, cholestane, ergosterol, sitosterol
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/74—Synthetic polymeric materials
    • A61K31/765—Polymers containing oxygen
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/63—Steroids; Derivatives thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/0012—Galenical forms characterised by the site of application
    • A61K9/0019—Injectable compositions; Intramuscular, intravenous, arterial, subcutaneous administration; Compositions to be administered through the skin in an invasive manner
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00—Drugs for disorders of the metabolism
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q19/00—Preparations for care of the skin
    • A61Q19/06—Preparations for care of the skin for countering cellulitis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/20—Chemical, physico-chemical or functional or structural properties of the composition as a whole
    • A61K2800/30—Characterized by the absence of a particular group of ingredients

Definitions

  • the present invention is related to compositions and methods useful for the non- surgical removal of localized fat accumulation. Specifically, the present invention is related to pharmacologically active detergent compositions than are suitable for injection directly into a treatment site of a patient in need of fat removal without the need for surgical intervention. BACKGROUND OF THE INVENTION
  • Formulations containing phosphatidylcholine and bile salts are increasingly being utilized to treat localized fat accumulation (1-8).
  • PBF phosphatidylcholine bile salt formulations
  • Phosphatidylcholine is a natural phospholipid that is an essential component of cell membranes and is important for normal cellular membrane composition and repair. Phosphatidylcholine is also the major delivery form of the essential nutrient choline. Choline itself is a precursor in the synthesis of the neurotransmitter acetylcholine, the methyl donor betaine and phospholipids, including phosphatidylcholine and sphingomyelin among others. Phosphatidylcholine is also involved in the hepatic export of very-low-density lipoproteins.
  • Bile salts have been used to improve the aqueous solubility of phosphatidylcholine and more recently, medications like amphotericin B, Taxol ® , and diazepam (9-14).
  • Highly purified phosphatidylcholine can be combined with the secondary bile salt sodium deoxycholate, an anti-microbial, benzyl alcohol, and water to form a stable, mixed micelle preparation that can be rapidly sterilized and used for intravenous administration (12).
  • Pharmaceutical preparations of this mixture known as Essentiale ® and Lipostabil ® , are marketed in other countries for treatment of liver disease and hyperlipidemia, respectively (12,15).
  • Phosphatidylcholine formulations are associated with localized burning sensations, erythema, transient urticaria and variable degrees of pruritus all of which usually resolve within a few days. More serious sequelae of ulceration and pain have also been seen.
  • An infectious granulomatous reaction has been reported in the thigh of a patient at the site of multiple phosphatidylcholine injections (7).
  • Increased dosages of injected phosphatidylcholine have paralleled side effects seen with large doses of oral and intravenous formulations of Lipostabil ® and include nausea, diarrhea, abdominal pain and syncope.
  • phosphatidylcholine-containing formulation cause reduction of subcutaneous fat deposits is unknown but several mechanisms have been proposed (4).
  • the first is that phosphatidylcholine could reduce the size of lipocytes by stimulating lipase activity.
  • the PBFs have been postulated to function as a detergent that emulsifies lipocyte cell membranes.
  • Detergents have been used in medicine for decades, specifically, as sclerosing agents commonly used in sclerotherapy (American College of Phlebology, 2003). Detergents possess unique polar and non-polar chemical properties which facilitates emulsification of insoluble substances by reducing surface tension at their interface (17).
  • Liposuction is one of the most popular cosmetic surgery procedures and involves the surgical removal of fat deposits using suction and optionally assisted by solutions to assist in fat removal.
  • Liposuction also known as lipoplasty or suction lipectomy, is a surgical procedure that removes fat through an incision in the skin through which a cannula is inserted. The cannula is connected to a suction source and the unwanted fat is aspirated through the cannula and discarded. Liposuction is performed under general or local anesthesia, depending on the amount and location of the fat to be removed.
  • liposuction additionally use fluid injection methodologies wherein a medicated solution containing a mixture of salts, an anesthetic and a vasoconstrictor, is infused into the treatment site prior to aspiration of the fat tissue.
  • the medicated solution helps the fat be removed more easily, reduces blood loss and provides anesthesia both during and after surgery.
  • Capella In an example of adjuvant solutions for liposuction, a United States Patent filed on April 22, 1997 and issued as U.S. Patent Number 5,891 ,083 on April 6, 1999 by Capella and Capella teaches liposuction and a carrier solution containing a compound for an improved surgical procedure for removing subcutaneous fat.
  • the Capella patent discloses the compound is an enzyme, particularly lipase or colipase. The enzyme is added to a carrier such as saline solution to provide a lipolysis solution.
  • Capella teaches emulsifying agents such as bile salts may also be beneficial in combination or as the primary active compound added to the solution.
  • the lipolysis solution is administered for a period of time before liposuction to allow for the solution to infiltrate the fat tissue.
  • a lipolysis solution alone disclosed as a non-surgical means for removing fat from the body is used as a surgical procedure for fat removal and lipase and bile salts are provided as an adjuvant to liposuction.
  • liposuction and other surgical methods of fat removal are associated with significant adverse events including temporary bruising, swelling, numbness, soreness and burning sensation, risk of infection, pigmentation changes; the formation of fat clots or blood clots which can migrate to the lungs and cause death, excessive fluid loss, which can lead to shock or fluid accumulation that must be drained, friction burns or other damage to the skin or nerves or perforation injury to the vital organs.
  • liposuction requires a recovery time of one to two weeks wherein the patient cannot work or perform certain daily activities.
  • surgical procedures such as liposuction require local and occasionally general anesthesia, significant anesthesia-related risks are associated with surgical fat removal.
  • the present invention provides a method for the non-surgical removal of localized fat deposits in patients by administration of fat-solubilizing concentrations of phosphatidylcholine-free detergent compositions in pharmaceutically acceptable formulations.
  • prior art formulations hereinafter referred to as phosphatidylcholine bile salt formulations (PBFs)
  • PC phosphatidylcholine
  • bile salts used to reduce localized fat deposits were thought to function through the activity of phosphatidylcholine alone.
  • Detergents such as bile salts were, merely added in small quantities to disperse the PC.
  • the present invention unexpectedly demonstrates that bile salts alone are the active agents responsible for the reduction of localized fat deposits, and possess detergent effects on muscle and connective tissue.
  • a non-surgical method of fat removal does not include liposuction, llipoplasty or suction lipectomy.
  • a medical composition for the non- surgical removal of localized fat deposits in a patient which comprises at least one pharmacologically active detergent, optionally at least one pharmaceutically acceptable excipient and optionally at least one additional active ingredient wherein the medical composition does not include phosphotidylcholine.
  • the pharmacologically active detergent can be an ionic detergent, a non-ionic detergent or a zwitterionic detergent.
  • the ionic detergent is at least one pharmacologically active bile salt.
  • the bile salt can be at least one of deoxycholic, cholic, chenodeoxycholic, 7-alpha-dehydroxylate, chenodeoxycholic, lithocholic, ursodeoxycholic, dihydroxy- and trihydroxy-bile salts.
  • the bile salts can be in the taurine or glycine conjugate forms.
  • the pharmacologically active detergent can be a non-ionic detergent such as alkylaryl polyether alcohol.
  • the pharmacologically active detergent can be zwitterionic detergent such as lauryldimethylbetaine.
  • the medical composition contains one or more additional active ingredients.
  • One or more additional active ingredients can include anti-inflammatory agents such as a steroidal anti-inflammatory agent or a non-steroidal anti-inflammatory agent; analgesics and dispersion agents such as hyaluronidase or collagenase.
  • the medical composition contains pharmaceutically acceptable excipients.
  • the patient is a human.
  • a method for the non-surgical removal of localized fat deposits in a patient having localized fat accumulation comprising administering a fat solubilizing amount of a pharmacologically active detergent composition, wherein the non-surgical method does not include liposuction.
  • the pharmacologically active detergent composition contains at least one pharmacologically active detergent, optionally at least one pharmaceutically acceptable excipient and optionally at least one additional active ingredient, and wherein the pharmacologically active detergent composition does not contain phosphatidylcholine.
  • the pharmacologically active detergent composition is administered by subcutaneous injection directly into fat tissue.
  • the localized fat accumulation is lower eyelid fat hemiation, lipomas, lipodystrophy, buffalo hump lipodystrophy or fat deposits associated with cellulite.
  • a medical composition for removing localized accumulation of fat in a patient with lower eyelid fat hemiation comprising a fat solubilizing amount of deoxycholic acid, and the medical composition does not contain phosphatidylcholine.
  • a non-liposuction method for the non- surgical removal of localized fat deposits in a patient comprising the non-surgical administration of a pharmacologically active detergent composition consisting essentially of at least one pharmacologically active detergent, optionally at least one pharmaceutically acceptable excipient and optionally at least one additional active ingredient, and the medical composition does not include phosphatidylcholine.
  • FIG. 1 depicts the molecular structure of (a) phosphatidylcholine (b) sodium deoxycholate and (c) benzyl alcohol.
  • FIG. 2 depicts the effects of phosphatidylcholine bile formulation (PC Formula, PBF) and sodium deoxycholate alone on cultured cell viability according to the teachings of the present invnetion: (a) MTS assay measuring viability of keratinocytes exposed to the PC Formula and sodium deoxycholate alone; (b) Lactate dehydrogenase (LDH) assay measuring LDH release by cells exposed to the PC Formula and sodium deoxycholate alone.
  • PC Formula, PBF phosphatidylcholine bile formulation
  • LDH Lactate dehydrogenase
  • FIG. 3 depicts the effects of PBF and sodium deoxycholate alone on primary porcine fat tissue according to the teachings of the present invention: (a) MTS assay producing purple pigment, indicating living cells, in fat specimens treated with the PBS buffer as negative control (- Cont), sodium deoxycholate alone (DC), the PBF (PC), and Triton ® detergent as positive control (+ Cont); (b) A comparison of fat cell viability between the different treatments.
  • FIG. 4 depicts calcein fluorescence in fat specimens treated with sodium deoxycholate alone (DC), PBF (PC), Triton ® detergent as positive control (+ Cont), and PBS buffer as negative control (- Cont) according to the teachings of the present invention.
  • FIG. 5 depicts light microscopy of porcine skin biopsies after treatment with compositions made according to the teachings of the present invention revealing (a) control lipocytes and (b) lipocytes after PBF injection (H&E, original magnification, x20); (c) control lipocytes and (d) lipocytes after injection of sodium deoxycholate alone (H&E, original magnification, x10); (e) control muscle and (f) muscle after injection of phosphatidylcholine alone (H&E, original magnification, x10); (g) fat after injection with Empigen ® detergent (H&E, original magnification, x20).
  • FIG. 6 depicts a lipoma removed from a patient two days after injection with deoxycholate according to the teachings of the present invention: (a) gross pathology and (b) histology (H&E, original magnification, x20). DETAILED DESCRIPTION OF THE INVENTION
  • the present invention addresses the problem of localized fat accumulation in patients by providing a non-surgical method for removing fat deposits by administration of fat-solubilizing concentrations of detergents in pharmaceutically acceptable formulations.
  • PBF phosphatidylcholine bile formulation
  • PC purified phosphatidylcholine
  • sodium deoxycholate a bile salt used for phospholipid solubilization
  • bile salts are particularly potent solubilizers of lipid bilayer membranes (9,20,21 ,23,28). All biologic cell membranes are composed of the same bilipid structure, and are therefore subject to solubilization by detergents (10,19,34). Solubilization of cell membranes by a detergent involves distribution of the detergent between lipid bilayers, destabilization of the bilayer, disintegration, and subsequent formation of mixed micelles (composed of detergent and cell membrane lipid) (10,19,21). Bile salts, and other detergents, decrease surface tension at the border of immiscible materials and allows the breakdown of large aggregates into smaller and smaller particles. In tissue, these agents dissolve cell membranes and cause cell lysis. An inflammatory response is generated, causing the body to remove the detergent solubilized material.
  • a non-binding hypothesis of the present inventors was that deoxycholate and PBF affect cell viability by disrupting cell membranes through detergent action.
  • Membrane lysis in cultured cells was measured using a lactate dehydrogenase (LDH) assay and within tissue using calcein, a fluorescent marker retained in cells with intact cell membranes.
  • LDH assay measures the activity of LDH, which is a cytosolic enzyme released when cells are lysed.
  • LDH lactate dehydrogenase
  • Both the PBF- and deoxycholate-treated cell cultures demonstrated a concentration-dependent increase in cell lysis (FIG. 2b).
  • the direct lytic effects observed in cultured cells treated with these agents suggest activity independent of endogenous lipase.
  • Calcein was lost in the fat specimens exposed to the PBF, deoxycholate, and Triton ® X-100, a known laboratory detergent (FIG. 4). This finding confirmed that disruption of cell membranes occurs in fresh tissue exposed to both the PBF and deoxycholate.
  • a medical composition of biologically compatible detergents includes pharmacologically active detergents and pharmaceutically acceptable excipients in an aqueous vehicle.
  • detergents other than bile salts can be used to dissolve fat according to the teachings of the present invention.
  • Biologically compatible detergents that can be used in embodiments of the present invention include, but are not limited to, ionic detergents, non-ionic detergents, zwitterionic detergents and bile salts.
  • Non-limiting examples of bile salts include deoxycholic, cholic, chenodeoxycholic, 7-alpha-dehydroxylate, chenodeoxycholic, lithocholic, ursodeoxycholic, dihydroxy- and trihydroxy-bile acids and the corresponding salts, taurine or glycine conjugates and related detergents.
  • a non-limiting example of an ionic detergent useful in an embodiment of the present invention is sodium deoxycholate.
  • a non-limiting example of a non-ionic detergent useful in an embodiment of the present invention is alkylaryl polyether alcohol (Triton ® X-100).
  • a non-limiting example of a zwitterionic detergent useful in an embodiment of the present invention is lauryldimethylbetaine (Empigen ® BB).
  • Suitable concentrations of detergents for use according to the teachings of the present invention range from approximately 0.001% to approximately 50.000%. It is understood that the final concentration is dependent on many factors known to persons skilled in the art including, but not limited to, location and size of the treatment site.
  • compositions produced according to the present invention can include other active ingredients including, without limitation, and in any compatible combination, anti- inflammatory agents, analgesics, dispersion agents, penetration enhancers and pharmaceutically acceptable excipients.
  • Anti-inflammatory agents suitable for use with the compositions of the present invention can include both steroidal anti-inflammatory agents and non-steroidal anti- inflammatory agents.
  • Suitable steroidal anti-inflammatory agent can include, although are not limited to, corticosteroids such as hydrocortisone, hydroxyltriamcinolone alphamethyl dexamethasone, dexamethasone-phosphate, beclomethasone dipropionate, clobetasol valerate, desonide, desoxymethasone, desoxycorticosterone acetate, dexamethasone, dichlorisone, diflorasone diacetate, diflucortolone valerate, fluadrenolone, fluclarolone acetonide, fludrocortisone, flumethasone pivalate, fluosinolone acetonide, fluocinonide, flucortine butylester, fluocortolone, fluprednidene (fluprednylid)
  • a second class of anti-inflammatory agents which is useful in the compositions of the present invention includes the nonsteroidal anti-inflammatory agents.
  • the variety of compounds encompassed by this group are well-known to those skilled in the art.
  • Suitable non-steroidal anti-inflammatory agents useful in the compositions of the present invention include, but are not limited to: the oxicams, such as piroxicam, isoxicam, tonexicam, sudoxicam, and CP-14,304; the salicylates, such as salicylic acid, aspirin, disalcid, benorylate, trilisate, safapryn, solprin, diflunisal, and fendosal; the acetic acid derivatives, such as diclofenac, fenclofenac, indomethacin, sulindac, tolmetin, isoxepac, furofenac, tiopinac, zidometacin, acematacin, fentiazac, zomepiract, clidanac, oxepinac, and felbinac; the fenamates, such as mefenamic, meclofenamic, flufenamic, and felbina
  • Analgesics suitable for use with the pharmacologically active detergent composition of the present invention to reduce discomfort due to inflammation after subcutaneous injection of the formulation of the present invention include, but are not limited to, injectable local amine and ester anesthetics.
  • Non-limiting examples of analgesics include lidocaine, mepivacaine, bupivacaine, procaine, chloroprocaine, etidocaine, prilocaine and tetracaine. Mixtures of these analgesics can also be employed, as well as the pharmaceutically acceptable salts and esters or these agents.
  • Pharmacologically acceptable aqueous vehicles for the compositions of the present invention can include, for example, any liquid solution that is capable of dissolving a detergent and is not toxic to the particular individual receiving the formulation.
  • examples of pharmaceutically acceptable aqueous vehicles include, without limitation, saline, water and acetic acid.
  • pharmaceutically acceptable aqueous vehicles are sterile.
  • Non-surgical refers to medical procedures that do not require an incision. Injections are examples of non-surgical procedures. Liposuction is a surgical procedure.
  • the pharmacologically active detergent composition is administered by injection, for example, by bolus injection.
  • the detergent composition In order to be effective, the detergent composition must have direct contact with the fat tissue regardless of how it is infused.
  • the detergent formulations can be injected subcutaneously or infused directly into the fat.
  • Formulations for injection can be presented in unit dosage form, for example, in ampoules or in multi-dose containers, with an added preservative.
  • the compositions can take such forms as suspensions, solutions, or emulsions in oily or aqueous vehicles, and can contain formulatory agents such as suspending, stabilizing and/or dispersing agents.
  • a "pharmaceutically acceptable excipient” means a compound that is useful in preparing a pharmaceutical composition that is generally safe, non-toxic and neither biologically nor otherwise undesirable, and includes excipients that are acceptable for veterinary use or human pharmaceutical use.
  • a pharmaceutically acceptable excipient as used in the specification and claims includes both one and more than one such excipient.
  • excipients include lactose, dextrose, sucrose, sorbitol, mannitol, starches, gum acacia, calcium phosphate, alginates, tragacanth, gelatin, calcium silicate, microcrystalline cellulose, polyvinylpyrrolidone, phosphatidylcholine, cellulose, sterile water, syrup, and methyl cellulose.
  • the formulations can additionally include: lubricating agents such as talc, magnesium stearate, and mineral oil; wetting agents; emulsifying and suspending agents; and preserving agents such as methyl- and propylhydroxy-benzoates and benzyl alcohol.
  • the compositions of the present invention can be formulated so as to provide quick, sustained or delayed release of the active ingredient after administration to the patient by employing procedures known in the art.
  • Additional excipients suitable for formulation with the detergent compositions of the present invention include penetration enhancers and dispersion agents.
  • dispersion agents which allow the dispersion of drugs in tissue include hyaluronidase and collagenase.
  • Hyaluronidase functions to augment tissue permeability and spread or dispersion of other drugs.
  • Collagenase has been used to isolate adipocytes from subcutaneous fat and does not have lytic effects on adipocytes themselves. Additionally hyaluronidase and collagenase can facilitate healing by accelerating removal of necrotic tissue after treatment with the detergent formulations of the present invention.
  • the pharmacologically active detergent compositions of the present invention are useful for treating localized fat accumulations, including but not limited to lower eyelid fat hemiation, accumulations on the waist, hips and other cosmetic areas, xanthelasma, lipomas and lipodistrophy, including "buffalo hump" lipodystrophy (3).
  • the detergent compositions of the present invention is useful for treating fat deposits associated with cellulite.
  • Phosphatidylcholine bile salt formulation (PBF) (5.0% highly purified soy derived PC, 4.75% sodium deoxycholate, and 0.9% benzyl alcohol, in sterile water, Table 1) was obtained from Hopewell Pharmacy, Hopewell, NJ.
  • Sodium deoxycholate and Triton ® X-100 detergent (Triton ® , alkylaryl polyether alcohol) were obtained from Sigma-Aldrich Corp. (St. Louis, MO).
  • Empigen ® BB detergent (Empigen ® , lauryldimethylbetaine, Calbiochem, Biosciences, Inc., La Jolla, CA).
  • Stock reagents (5% dilutions) were prepared in PBS buffer.
  • HaCaT human keratinocyte cells were cultured in DMEM (Dulbecco's modified Eagle's medium) supplemented with 10% fetal calf serum, penicillin, and streptomycin.
  • HaCaT cells were cultured in 6 well plates and incubated with 0%, 0.005%, 0.050% or 0.500% PBF (PC Formula) or sodium deoxycholate for 30 min at 37°C prior to determination of cell viability using the MTS assay, which uses a tetrazolium compound that produces a color change when bioreduced by metabolically active cells (CellTiter 96 ® AQ ueous Non-Radioactive Cell Proliferation Assay, Promega, Corp.
  • PC Formula PC Formula
  • Porcine tissue was obtained immediately after sacrifice, shaved, and placed on ice for a maximum of four hours before use.
  • Fat specimens were obtained by removing the epidermis and dermis of a punch biopsy with a scalpel and trimmed. Fat specimens were loaded with calcein dye by incubating 1 hour at 37°C with Calcein-AM (Sigma). Stock reagents were added to the fat specimens and incubated for 30 min at 37°C with gentle agitation. Calcein retention was determined by tissue fluorescence using purple (411 nm) light and visually observing the emitted green (500 nm) light using an emission filters.
  • Histology was performed by injecting stock reagent solutions (0.5 mL) into full thickness porcine skin at various levels (epidermis, dermis, and subcutaneous tissue) with 1.0 mL syringes and 30-gauge, 0.5 inch needles. Needle depth was visualized along the margin of the porcine tissue with the intent of saturating the target tissue.
  • PBS PBS
  • multiple 5.0 mm biopsy specimens were obtained from the injected sites, each condition performed in triplicate. Tissue was fixed in formaldehyde, paraffin-embedded, and stained with hematoxylin-eosin. Specimens were evaluated by a board-certified dermatopathologist who was blinded to the treatment protocol.
  • FIG. 3a demonstrates the production of dark purple pigment (indicating viable cells) in fat tissue treated with the PBS buffer (negative control) using the MTS assay.
  • the PBF and 5% solutions of deoxycholate and Triton ® detergent (positive control) demonstrated a comparable loss of purple dye (indicating cell death) in the treated fat specimens.
  • the difference in fat cell viability between the solutions was quantified by measuring the absorbance (at 490) of the supematants collected from the treated fat specimens (FIG. 3b). All reagents had significant effects on the fat cell viability of fresh tissue.
  • FIG. 5 The histologic changes resulting from injection of PBF, deoxycholate, and Empigen ® , are shown in FIG. 5.
  • Phosphatidylcholine bile salt formulation (FIG. 5b) and deoxycholate (FIG. 5d) produced histologic effects similar to those caused by Empigen ® (FIG. 5g) and Triton ® (not shown), two well-characterized laboratory detergents. These changes were apparent in both fat and muscle. Marked blurring and dissolution of adipocyte cell membranes with disruption of its normal lobular architecture were seen after injection of both the PBF (FIG. 5b) and deoxycholate (FIG. 5d).
  • Figure 5f demonstrates muscle fiber disarray and atrophy after PBF injection.

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PCT/US2005/004184 2004-05-19 2005-02-08 Use of a detergent for the non-surgical removal of fat WO2005117900A1 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
AT05722895T ATE521355T1 (de) 2004-05-19 2005-02-08 Verwendung eines detergens zur nicht- chirurgischen entfernung von fett
EP05722895A EP1758590B1 (en) 2004-05-19 2005-02-08 Use of a detergent for the non-surgical removal of fat
MXPA06013437A MXPA06013437A (es) 2004-05-19 2005-02-08 Uso de un detergente para la eliminacion no quirurgica de grasa.
DK05722895.9T DK1758590T3 (da) 2004-05-19 2005-02-08 Anvendelse af et detergent til ikke-kirurgisk fjernelse af fedt
PL05722895T PL1758590T3 (pl) 2004-05-19 2005-02-08 Zastosowanie detergentu do niechirurgicznego usuwania tłuszczu
EP18185014.0A EP3424508B1 (en) 2004-05-19 2005-02-08 Use of sodium deoxycholate for the removal of localized fat accumulation
AU2005245002A AU2005245002B8 (en) 2004-05-19 2005-05-19 Methods and related compositions for reduction of fat
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